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Change in Membrane Potential quiz

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  • Why does depolarization occur in a neuron?
    Depolarization occurs when the inside of the neuron's membrane becomes more positive, moving away from the resting potential of -70 millivolts.
  • What ionic change is likely to cause depolarization of a neuron?
    Increase in positive ions inside the neuron
  • What happens when a resting neuron's membrane depolarizes?
    When a resting neuron's membrane depolarizes, the inside of the membrane becomes more positive, moving away from the resting potential.
  • How does a neuron cell membrane become depolarized?
    A neuron cell membrane becomes depolarized when positive ions enter the neuron, making the inside of the membrane more positive.
  • When a cell is stimulated, how does the membrane depolarize?
    When a cell is stimulated, positive ions flow into the cell, causing the membrane to depolarize and become more positive.
  • What is the resting membrane potential of a neuron?
    The resting membrane potential of a neuron is -70 millivolts.
  • What is repolarization in the context of membrane potential?
    Repolarization is the process where the membrane potential returns to a more negative state after depolarization, aiming to reach the resting potential.
  • What does hyperpolarization mean in terms of membrane potential?
    Hyperpolarization occurs when the membrane potential becomes more negative than the resting potential, often due to an overshoot during repolarization.
  • What are the two types of signals resulting from changes in membrane potential?
    The two types of signals are graded potentials and action potentials.
  • What does it mean for a neuron to be polarized?
    A neuron is polarized when the inside of its membrane is negatively charged, typically at -70 millivolts, indicating it is at rest.